Missing ".TH" section when converting .rst file to groff format in pandoc (reStructuredText, manpage) - documentation

Question

What should I put in a source reStructuredText file to populate the "Title Heading" (.TH) line in the destination file when using pandoc to convert it to groff-format?
I have a python project whose documentation is built with sphinx. As such, most of the project's documentation is already written in reStructured Text (.rst files). I need to write a manpage, so I'd like to write it in reST format.
Unfortunately, when I use pandoc to convert the source .rst file to man (groff-format), the file doesn't render properly with man since it's missing the Title Heading.
For example, consider the following source file source.rst
==========
my-program
==========
----------------------
my-program description
----------------------
:manual section: 1
:manual group: John Doe
Synopsis
========
**my-program**
Description
===========
**my-program** is magical. It does what you need!
I use pandoc to convert it to groff format as follows:
user#disp117:~$ pandoc source.rst -t man > my-program.1
user#disp117:~$
user#disp117:~$ cat my-program.1
.SH my-program
.SS my-program description
.TP
manual section
1
.TP
manual group
John Doe
.SS Synopsis
.PP
\f[B]my-program\f[R]
.SS Description
.PP
\f[B]my-program\f[R] is magical.
It does what you need!
user#disp117:~$
Now, if I try to render that groff file, then it doesn't format properly.
user#disp117:~$ groffer --text my-program.1
manual section 1 manual group John Doe my‐program my‐program is
magical. It does what you need!
...
However, if I manually add the a .TH line to the file, then it works as expected.
user#disp117:~$ echo -e ".TH my_program(1)\n$(cat my-program.1)" > my-program.1
user#disp117:~$
user#disp117:~$ groffer --text my-program.1
my_program(1)() my_program(1)()
my-program
my-program description
manual section
1
manual group
John Doe
Synopsis
[B]my-program
[R]
Description
[B]my-program
[R] is magical. It does what you need!
my_program(1)()
user#disp117:~$
What do I need to add to source.rst such that pandoc will produce a file in groff-format that includes the .TH line?

Answer 1

Pandoc generates "snippets" by default; those snippets are intended to be integrated into a complete document. Make pandoc generate a complete document with
pandoc --standalone ...
or
pandoc -s ...